Let me tell you a little story about the day that Jeffrey went to test several Habitat for Humanity houses that are going for certification in the ENERGY STAR new homes program (the one in the photo here was not…
The typical new home gets a heating and air conditioning system that's about two times too large. Look, I've discussed oversized air conditioners many times before. Most HVAC contractors use a rule of thumb that says they should put in…
My Building Science Summer Camp photo highlights was article number 500 published in the Energy Vanguard Blog! I starting writing this blog on 7 March 2010 and have poured innumerable hours into it since. The actual number is higher than…
Last week, Joe Lstiburek gave the fifth annual twitterview† from his crawl space. (When he gets back from sailing this week, Peter Troast of Energy Circle has promised to publish the transcript.) One of the pearls of wisdom dispensed by…
Building Science Summer Camp ended yesterday. It's been another fabulous event, the third one I've attended since getting myself invited by writing this piece that caught Joe Lstiburek's attention. As I wind down and reflect on the things I learned…
The great ventilation debate of 2013 roars on. Last month, I wrote about Building Science Corporation's residential ventilation standard for new homes, to be released officially at Building Science Summer Camp this week, and then followed that up with an…
Sometimes people do the craziest things. Take that photo above, for example. That's a new home being built in Austin, Texas. The arrows point to three air conditioning ducts. In the garage. Yes, they're air conditioning the garage. Mistake #1:…
Overall, the state of the construction industry is improving. A lot of home builders and remodelers are learning, either out of interest or coercion, about building science and how to apply it to their work. Overall, the state of the…
I'm a big advocate of getting ducts inside the building enclosure. In cooling climates, getting ducts out of an unconditioned attic can save you 15% on your electricity bills. It can reduce the size of air conditioner you need by…
Duct leakage testing has come a long way. We've gone from doing the subtraction method with blower doors to having specialized duct pressurization blowers. We've also evolved in how we seal the ducts for a test, going from kraft paper/masking…